E911 PHASE 2 LOCATION SOLUTION LANDSCAPE

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E911 PHASE 2 LOCATION SOLUTION LANDSCAPE

• Mark Birchler, Manager
• Wireless Access Technology Research
• Motorola Labs
• birchler_at_rsch.comm.mot.com

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ACRONYMS

• A-GPS
• Assisted Global Positioning System
• AOA
• Angle of Arrival
• E-FLT
• Enhanced Forward Link Triangulation
• E-OTD
• Enhanced Observed Time Difference
• RSS
• Received Signal Strength
• TDOA
• Time Difference of Arrival
• TOA
• Time of Arrival

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LOCATION SOLUTION FAMILY TREE
Where are you?
NETWORK
HANDSET
Fingerprint
E-OTD (TDOA)
A-GPS
TOA
GPS
TDOA RSS
E-OTD A-GPS
TDOA AOA
E-FLT
E-FLT A-GPS
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NETWORK BASED TDOA

• Network impact
• Location calculation and control
• Network interconnection (digital systems)
• Site impact
• Location receivers
• Handset impact
• None
• Systems addressed
• Shipping product AMPS
• Announced product need data
• Under development need data
• Legacy handsets
• Covered

Location Calc Control
Serving Cell
Neighbor Cell 1
MS
Location Receivers
Neighbor Cell 2

• TDOA Time Difference of Arrival
• Minimum of 3 sites measure arrival time of MS
  transmission
• Location solution based on apparent arrival time
  differences between pairs of sites

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NETWORK BASED AOA

• Network impact
• Network interconnection (digital systems)
• Location calculation and control
• Site impact
• Location receivers
• Additional antenna arrays plus cables
• Handset impact
• None
• Systems addressed
• Shipping product need data
• Announced product need data
• Under development need data
• Legacy handsets
• Covered

Location Calc Control
Antenna Array
Neighbor Cell 1
Serving Cell
MS
Location Receivers

• AOA Angle of Arrival
• Minimum of 2 sites measure arrival angle of MS
  transmission
• Location solution based on apparent signal
  arrival angle

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NETWORK BASED MULTIPATH FINGERPRINT

• Network impact
• Network interconnection (digital systems)
• Location calculation and control
• Site impact
• Location receivers
• Handset impact
• None
• Systems addressed
• Shipping product need data
• Announced product need data
• Under development need data
• Legacy handsets
• Covered

Location Calc Control
Serving Cell
MS
Location Receivers

• Multipath Fingerprint
• Minimum of 1 site measures attributes of received
  signal (i.e., multipath fingerprint)
• Location solution based on matching of received
  signal fingerprint with predetermined
  location/fingerprint data base

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HANDSET/NETWORK BASED E-FLT
Location Calc Control

• Network impact
• Location calculation and control
• Site impact
• Calibration of site sync
• Handset impact
• None
• Systems addressed
• Shipping product
• Announced product
• Under development CDMA
• Legacy handsets
• Covered

Serving Cell
Neighbor Cell 1
MS
Synchronized Sites
Neighbor Cell 2

• E-FLT Enhanced Forward Link Triangulation
• TDOA solution based on MS measurements
• TOA ranging coarse AOA via existing site
  antennas
• CDMA unique solution

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HANDSET BASED A-GPS

• Network impact
• GPS assist and location calculation
• Site impact
• Potential enhancements for non-synchronized
  systems
• Handset impact
• Second GPS antenna
• GPS RF front end processing
• Memory
• Software
• Systems addressed
• Shipping product need data
• Announced product need data
• Under development need data
• Legacy handsets
• Not covered

GPS Assist Location Calc
GPS SV
Serving Cell
MS

• A-GPS Assisted Global Positioning System
• Minimum of 1 site data link plus time of arrival
  (TOA) measurements to 3 GPS satellites (SV)
• Location solution based on apparent TOA from GPS
  SVs

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HANDSET BASED E-OTD
Location Calc Control

• Network impact
• Location calculation and/or control
• Site impact
• EITHER time synchronization enhancement
• OR site time error measurement and calibration
  (LMUs)
• Handset impact
• Memory
• Software
• Systems addressed
• Shipping product need data
• Announced product need data
• Under development GSM
• Legacy handsets
• Not covered

Serving Cell
Neighbor Cell 1
MS
Synchronized Sites or LMUs
Neighbor Cell 2

• E-OTD Enhanced Observed Time Difference
• TDOA solution in handset
• Arrival time of transmissions from a minimum of 3
  sites
• Location solution based on apparent arrival time
  differences between pairs of sites

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COMPOSITE SYSTEMS

• AOA RSS (Received Signal Strength)
• AOA TDOA
• E-OTD A-GPS
• A-GPS E-FLT
• Other?